Image caption
Predictions of the probability of a heat wave in the global oceans in September 2023. The first image uses departures from the 1991-2020 average to classify heat waves. The second image shows the affected area if the observed warming trend over that period is removed, showing the portion of the event that would have been "extreme" even without global warming. NOAA Climate.gov image, based on maps from NOAA Physical Sciences Lab.